20836720

素因数分解:

$2^4\times 5^1\times {\mathrm{181}}^1\times {\mathrm{1439}}^1$

素因数の和:1633

約数の個数: 40

約数和(自身を含む): 48746880

約数和(自身を除く): 27910160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 181, 362, 724, 905, 1439, 1448, 1810, 2878, 2896, 3620, 5756, 7195, 7240, 11512, 14390, 14480, 23024, 28780, 57560, 115120, 260459, 520918, 1041836, 1302295, 2083672, 2604590, 4167344, 5209180, 10418360, 20836720]

約数ペア:

[(1, 20836720), (2, 10418360), (4, 5209180), (5, 4167344), (8, 2604590), (10, 2083672), (16, 1302295), (20, 1041836), (40, 520918), (80, 260459), (181, 115120), (362, 57560), (724, 28780), (905, 23024), (1439, 14480), (1448, 14390), (1810, 11512), (2878, 7240), (2896, 7195), (3620, 5756)]